package com.itheima.job;
import com.itheima.constant.RedisConstant;
import com.itheima.utils.QiniuUtils;
import org.springframework.beans.factory.annotation.Autowired;
import redis.clients.jedis.JedisPool;
import java.util.Set;
/**
 * 自定义Job，实现定时清理垃圾图片
 */

public class ClearImgJob {
    @Autowired
    private JedisPool jedisPool;
    public void clearImg(){
//根据Redis中保存的两个set集合进行差值计算，获得垃圾图片名称集合
        Set<String> set =
                jedisPool.getResource().sdiff(RedisConstant.SETMEAL_PIC_RESOURCES,
                        RedisConstant.SETMEAL_PIC_DB_RESOURCES);
        if(set != null){
            for (String picName : set) {
//删除七牛云服务器上的图片
                QiniuUtils.deleteFileFromQiniu(picName);
//从Redis集合中删除图片名称
                jedisPool.getResource().
                        srem(RedisConstant.SETMEAL_PIC_RESOURCES,picName);
            }
        }
    }
}
